ldmud: use libxcrypt-legacy

The LDMud game driver defaults to using a legacy DES hash that is
(sensibly) only enabled in the libxcrypt-legacy derivation, not
libxcrypt.

This commit switches LDMud to that build input instead of libxcrypt.
This fixes a runtime error when calling `efun::crypt()` from LPC that
would print a confusing error message like "crypt() is not available.".

pkgs/games/ldmud/default.nix

@@ -7,7 +7,7 @@
 , libiconv
 , pcre
 , libgcrypt
-, libxcrypt
+, libxcrypt-legacy
 , json_c
 , libxml2
 , ipv6Support ? false
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs =
     [ autoreconfHook pkg-config bison ];
-  buildInputs = [ libgcrypt libxcrypt pcre json_c libxml2 ]
+  buildInputs = [ libgcrypt libxcrypt-legacy pcre json_c libxml2 ]
     ++ lib.optional mccpSupport zlib ++ lib.optional mysqlSupport libmysqlclient
     ++ lib.optional postgresSupport libpq
     ++ lib.optional sqliteSupport sqlite ++ lib.optional tlsSupport openssl